new module: metabuli/classify

[sofstam]

https://github.com/steineggerlab/Metabuli

Is there an existing module for this?

• [x] I have searched for the existing module

Is there an open PR for this?

• [x] I have searched for existing PRs

Is there an open issue for this?

• [x] I have searched for existing issues

Further Information

No response

Are you going to work on this?

• [ ] If I'm planning to work on this module, I added myself to the Assignees to facilitate tracking who is working on the module

[pawelciurkaardigen]

I found there is a not merged PR that adds 3 metabuli modules: https://github.com/nf-core/modules/pull/5862